Engine.



No. 687,628. Patented Nov. 26, I90l.

- l C. G. HOLMBERG.

ENGINE. A umion filed Oct. 4, 1900.) (No Modal.) 5 Sheets'-Sheet I.

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c. a. nomigena. ENGINE.

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ENGINE.

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No. 687,628. v Patented rm.- 26, I90].

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-ENG||IE. (Application filed Oct. 4, 1900.)

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UNITED STATES PATENT OFFICE.

CHARLES GUSTAVE HOLMBERG, or "WOONSOOKET, SOUTH DAKOTA, ASSIGNOR TO ANNAHOLMBERG, JOHN M. WHEELER, AND LOREN H. PIER, or WOONSOCKET, SOUTHDAKOTA.

IENGINE.

SPECIFICATION forming part of Letters Patent No. 687,628, dated November26, 1901.

Application filed October 4, 1900. Serial No. 31,975. (No model.) A

To aZZ whom it may concern:

Be it known that I, CHARLES GUSTAVE HOLMBERG, a citizen of the UnitedStates, and a resident of Woonsocket, in the county of 'Sanborn andState of South Dakota, have invented a new and Improved Engine, of whichthe following is a full, clear, and exact de- The invention consists ofnovel features and parts and combinations of the same, as will ef-ullydescribed hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews. A

Figure 1 is a front elevation of theilnprovement. Fig. 2 is sectionalrear elevation of the same on the line 2 2 in Fig. 3. Fig. 3 is a planview of the same with the governor and connections removed. Fig. 4 is arear elevation of the cylinder and mechanism for actuating the valves.Fig. 5 is a similar view of the same with parts in a diflerent position.Fig. 6 is an enlarged sideelevation, with part in section, of one of thevalves for controlling the motive agent. Fig. 7 is a sectional plan viewof the same. Fig. 8 is an enlarged sectional plan view of the cylinder.Fig. 9 is an enlarged side elevationof the crank-arm for connecting thepitmen with the piston-shaft. Fig. 10 is an enlarged sectional sideelevation of part of the cylinder, the piston, and one of the valves forcontrolling the motive agent. Fig. 11 is an enlarged sectional sideelevation of the cylinder piston and valves, the section being on theline 11 11 in Fig. 8; and Fig. 12 is a similar view of the same withparts in a diiferent position.

In the cylinder A oscillates a piston B, secured 011 atransversely-extending shaft 0, mounted to turn in suitable bearings inthe heads of the cylinder and connected at one outer end by a doublecrank-arm D with pitmen. E E, connected with the crank-arms F F of themain driving-shaft F of the engine,- said driving-shaft having a pulleyF for transmittin g the rotary motion of the shaft to other machinery.The main shaft is also provided with a fiy-wheel F as shown in Fig. 1.

The cylinder A is formed with two working chambers A A formed bypartitions A A integral with the cylinder, and into said Workingchambers A A extend the wings or piston-heads B 13 0f the piston 13, asis plainly shown in Figs. 10, 11, and 12. The pistonheads B B standdiametrically opposite each other, and when the engine is running themotive agent acts simultaneously on the said piston-heads in such amanner that one is moved in its working chamber from the partition A tothe partition A, while the other piston-head is moved in its workingchamber, but from the partition A to the partition A In the partitions AA are formed valvechests G G, respectively, containing oscillatingvalves H H, respectively, for controlling the motive agent to and fromthe working chambers A A as hereinafter more fully explained.

In one of the heads of the cylinder A are formed ports a 1), leading attheir inner ends to the valve-chests G G and connected at their outerends with the motive-agent-supply pipes I I, respectively, connectedwith the boiler-pipe 1 containing a valve 1 under the control of thegovernor 1 The valvechests G G are also connected by ports 0 c with theworking chamber A, and similar ports at (1 connect the said. chests withthe chamber A The ports 0 d and o d are controlled by the valves H H,respectively, so that motive agent is admitted to one chamber A or Awhile exhaust takes place from the other chamber through thecorresponding valve, the exhaust motive agent passing from chestextensions G G3 to exhaust-pipes J J, leading to the outer air.

IOQ

age. The main valve H is secured on a hollow stem H and the auxiliaryvalve H is secured on a stem H mounted to turn in the hollow stem H (SeeFigs. 6 and 7.) The hollow stem H is mounted to turn in suitablebearings carried by the heads of the cylinder A, and the outer ends ofthe stems H carry arms H pivtoally connected with each other by a link Hso that when a rocking motion is given to one of the stems H then bothstems for the valves H H are simultaneously rocked. The stems H for thetwo valves H H are similarly connected with each other-that is, they areprovided with arms H pivotally connected with each other by a link H andconsequently when one of the stems H is rocked a similar rocking motionis given to the other stem. In the cut-off flanges H for the valve H areformed ports e f, adapted to register with the ports a d in thepartition A and similar ports ef are also formed in the cutoff flanges Hfor the valve H, and the ports e fare adapted to register with the portsa (1'. (See Figs. 11 and 12.) a

In order to impart the desired oscillating motion to the valves, thestem H of the valve H is provided with an arm K, arranged to receivemotion from the main driving-shaft F by the mechanism hereinafter morefully described, and said arm K is formed on its upper end withshoulders K K adapted to alternately engage the free end of an arm Ksecured to the stem H so that the rocking motion of the latter iscontrolled from the stem H itbeing understood that upon swinging the armK in one direction one shoulder K or K engages the arm K and carries thelatter along, and when the arm K is on the return stroke the arm Kremains at a standstill for the time being until the other shoulderK orK engages the arm K and again carries the same along. The lower end ofthe arm K is pivotally connected by a link L with an arm N, fulcrumed atits lower end on the frame of the engine, said arm carrying near itsupper end a pin N, loosely engaging the free end of an eccentric-rod Oof an eccentric held on the main shaft F of the engine. The pin N isadapted to be engaged by adjustable lugs O O on the eccentric-rod 0,said lugsb'eing preferably screwed on the cocentric-rod, so as to permitproper adjustment of the same, according to the time the cut-off is totake place in the valves H H. On the link L, previously mentioned, areheld adjustable lugs L L3, adapted to alternately engagearms P P,fulcrumed at their lower ends on one of the cylinder-heads, the upperends of said arms being connected with each other bya spring P to drawthe arms toward each other and against stop-pins P 'P projecting fromthe cylinder-head. When the engine is in motion, the eccentric O by thelugs O O imparts an intermittent swinging motion to the arm N, and thismovement of the arm is transmitted by the link L to the teases arm K, sothat the two valves H Hare si multaneously actuated to cause 'the valveH to admit live motive agent to one working chamber and to allow theexhaust of the other working chamber to pass to the open air, while theother valve H admits motive arrow a, it being understood that a likeaction takes place against the other piston-head B by the motive agentpassing through the valve H and the registering portsf and b into theworking chamber A When the ports 6 and f are in register with the ports0 and d and a sufiicient quantity of motive agent has been admitted tothe chamber A, as described, then the rocking motion given to the arm Kby the eccentric O and intermediate connections causes the main valve Hto turn, while the auxiliary valve H remains stationary for the timebeing, it being understood that when this movement of the main valvetakes place the motive agent is gradually cut off from the ports 6 andf, and consequently from the ports 0 and d and the working chambers A AWhen the motive agent has finally been out off, the shoulder K or K onthe rocking arm K engages the free end of the arm K and carries the samealong, sothat the main valves H and their auxiliary valves H movetogether, the motive agent being out 01f during the time thepiston-heads B B are on their outward stroke. Thus if the motive agentis steam it works expansively in the working chambers A A When thepiston-heads have reached the ends of their strokes, the position of thevalves is re= versed by the action of the eccentric and the partsconnecting the eccentric with the arm K, so that the motive agent isagain admit ted to the working chambers to move the piston-heads B B ontheir return stroke-that is, in the inverse direction of the arrow a.(See Fig. 11.) I

It is understood that when the link L moves in the direction of thearrow a (see Fig. 4) besides imparting a rocking motion to the arm K itimparts a swinging motion to the arm P, so that the latter ismoved awayfrom its stop-pin P and the spring P is placed under tension. When theeccentric O is on the return stroke and the lug 0 moves away from thearm N, then the spring P draws the arm P back to its former positionagainst the stop-pin P and in doing so imparts movement to the link L inthe inverse direction of the arrow 03, so that the arm K is rocked,while the arm K remains stationary to cause the movement of the mainvalves H of the valves H H for cutting-01f purposes, as above explained.On a further movement of the eccentric-rod O to the right the lug Ofinally comes in contact with the arm N and swings the same to theright, and with it the. arm K, by the action of the link L, and when theeccentric O nears the end of the stroke to the right then the lug Lengages the arm P and swings the sameaway from its stop-pin P and at thesame time places the spring P under tension, so that upon the returnstroke of the eccentric O and its rod 0 the arm N, and with it the armK, receive a short swinging motion owing to the return movement of thearm P caused by the spring P said arm pressing against the lug L in theinverse direction of the arrow (1".

From the foregoing it is evident that by the operator adjusting the lugsO O on the eccentric-rod O and the lugs L L on the link L any desiredtime of cut-oft can be given to the valves H H for admitting more orless motive agent to the working chambers A A as may be desired.

The crank-arm D, connected with the pitmen E E, is made in sections D Dpivotally connected with each other at adjacent ends by a link D saidsections being secured on the fork-arms 0 0 carried by the cylindershaft0, as is plainly indicated in Figs. 8 and 9. The pitmen E E haveadjustable connection at their wrist-pins'with the sections D D it beingunderstood that the sections partly close and open alternately, owing tothe link D at the time the crank-arms F F pass over their dead-centerpositions, and consequently the sections D D stand at angles to oneanother to avoid dead-center positions.

Having thus fullydescribed my invention, I claim as new and desire tosecure by Letters Patent- 1. An engine having a cylinder with twoWorking chambers,a piston oscillating therein and having piston-heads,one for each working chamber, and valves each controlling the inlet andexhaust of the motive agent to and from said working chambers at oneside of the piston-heads, the said valves each comprising a main valve,and an auxiliary valve controlled from the main valve, as set forth.

2. An engine havinga cylinder formed with working chambers separated byfixed,partitions, each of which has a valve-chest provided with portsconnecting said valve-chest with said working chambers, a pistonoscillating in said cylinder and having pistonheads, one for eachworking chamber, and valves oscillating in said chests, for controllingthe inlet and exhaust of the motive agent,

each valve comprising a main valve and an auxiliary valve, the auxiliaryvalve being controlled from the main valve, as set forth.

3. An engine having a cylinder formed with working chambers separated byfixed partitions, each of which has a valve-chest provided with portsconnecting said valve-chest with said working chambers, a pistonoscillating in said cylinder and having pistonheads, one for eachworking chamber, valves oscillating in said chests for controlling theinlet and exhaust of the motive agent, each valve comprising a mainvalve and an auxiliary valve, the auxiliary valve being controlled fromthe main valve, and means for actuating said main valves, as set forth.

4. An engine, comprisingacylinder formed with working chambers separatedby fixed partitions, each of said partitions having a valve-chestprovided with ports connecting said valve-chest with said workingchambers, one of the heads of said cylinder being provided with portsleading at their inner ends to the said valve-chests and connected attheir outer ends with the motive agent-supply pipes, a pistonoscillating in said cylinder and having piston-heads one for eachworking chamber, valves in said chests for controlling the inlet andexhaust of the motive agent, each valve comprising a main valve, and anauxiliary valve, means for imparting motion to the main valve, andmeansfor controlling the auxiliary valve from the main valve, as

I set forth.

5. An engine comprising a cylinder, fixed partitions in said cylinderdividing the same into two working chambers, a valve-chest in eachpartition provided with ports connecting said valve-chest with theworking chambers, the said valvechests being provided with chamberextensions arranged in the said par-' titions and closed at their innerends, the said chamber extensions leading to exhaust-pipes connectedwith one of the cylinder-heads, a piston oscillating in said cylinderand having piston-heads one for each working chamber,- and valves insaid valve-chests for'controlling the inlet and exhaustof the motiveagent, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES GUSTAVE HOLMBERG.

Witnesses:

L. H. PIER, H. S. SMYTHE.

